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Consider the Molecular Orbital $(MO)$ theory to explain the bonding and properties of molecules. There is linear combination of atomic orbitals to form $MOs –$ bonding MO (provides stability) and anti-bonding $MO$ (provides instability). The electronic configuration of a molecule/ion is built following rules similar to that of an atom $– auf-bau$ principle, Pauli’s exclusion principle and Hund’s rule of maximum multiplicity. Answer the following questions based on configurations that can be written for molecules/species based on $MO$ theory.

Q. Which of the following statement is correct?

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Bond length:

C O^{+} > C O

Stability:

N O^{-} > N O^{+}

Ionization Energy:

N > O > N O

O_{2} P t F_{6}

is diamagnetic.

answer is C.

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Detailed Solution

Bond order of

{CO}^{+}

3 .5

while that of CO is 3. Bond order of

{NO}^{-}

is 2 while that of

N O^{+}

is 3.

O_{2}^{+}

is paramagnetic. The energy of HOMO of NO is lower than the AO of N and O.

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